Royal Borough of Kensington & Chelsea Planning & Conservation The Town Hall Hornton Street London W8 7NX Our D
4 November 2014
Dear Sir/Madam
Re: 257-265 KENSINGTON HIGH ST, 4-10 & 24, EARL'S COURT ROAD, LONDON, W8 6EA
Waste Comments
With the information provided Thames Water, has been unable to determine the waste water infrastructure needs of thi
Authority look to approve the application ahead of further information being provided, we request that the following 'Gra
Development shall not commence until a drainage strategy detailing any on and/or off site drainage works, has been su
planning authority in consultation with the sewerage undertaker. No discharge of foul or surface water from the site sha
until the drainage works referred to in the strategy have been completed. Reason - The development may lead to sewa
capacity is made available to cope with the new development; and in order to avoid adverse environmental impact upon
Planning Authority consider the above recommendation is inappropriate or are unable to include it in the decision notice
Authority liaises with Thames Water Development Control Department (telephone 0203 577 9998) prior to the Planning
Following initial investigation, Thames Water has identified an inability of the existing wastewater infrastructure to accom
Should the Local Planning Authority look to approve the application, Thames Water would like the following 'Grampian
shall not commence until a drainage strategy detailing any on and/or off site drainage works, has been submitted to and
authority in consultation with the sewerage undertaker. No discharge of foul or surface water from the site shall be acce
drainage works referred to in the strategy have been completed. Reason - The development may lead to sewage floodi
made available to cope with the new development; and in order to avoid adverse environmental impact upon the comm
all surface water to be disposed of on site using SUDs as per policy 5.13 of the London plan. The London plan Policy 5
options for surface water drainage and as such we would expect the development proposal to follow this. Policy 5.13: T
seek to ensure that surface water run-off is managed as close to its source as possible in line with the following drainag
use >Use infiltration techniques, such as porous surfaces in non-clay areas >Attenuate rainwater in ponds or open wate
watercourse >Attenuate rainwater by storing in tanks or sealed water features for gradual release to a watercourse >Di
watercourse >Discharge rainwater to a surface water drain >Discharge rainwater to the combined sewer. The use of su
should be promoted for development unless there are practical reasons for not doing so. Such reasons may include the
development. In such cases, the developer should seek to manage as much run-off as possible on site and explore sus
remainder as close as possible to the site. The Mayor will encourage multi agency collaboration (GLA Group, Environm
sustainable solutions to strategic surface water and combined sewer drainage flooding/overflows. Developers should ai
their site through incorporating rainwater harvesting and sustainable drainage. Boroughs should encourage the retentio
and other means of reducing or at least not increasing the amount of hard standing associated with existing homes.Sho
consider the above recommendation is inappropriate or are unable to include it in the decision notice, it is important tha
with Thames Water Development Control Department (telephone 0203 577 9998) prior to the Planning Application app
No impact piling shall take place until a piling method statement (detailing the depth and type of piling to be undertaken
piling will be carried out, including measures to prevent and minimise the potential for damage to subsurface sewerage
the works) has been submitted to and approved in writing by the local planning authority in consultation with Thames W
accordance with the terms of the approved piling method statement. Reason: The proposed works will be in close prox
infrastructure. Piling has the potential to impact on local underground sewerage utility infrastructure. The applicant is ad
Developer Services on 0845 850 2777 to discuss the details of the piling method statement.
Where a developer proposes to discharge groundwater into a public sewer, a groundwater discharge permit will be requ
result from construction site dewatering, deep excavations, basement infiltration, borehole installation, testing and site r
enquiries should be directed to Thames Water’s Risk Management Team by telephoning 020 8507 4890 or by emailing
wwqriskmanagement@thameswater.co.uk. Application forms should be completed on line via www.thameswater.co.uk
without a permit is deemed illegal and may result in prosecution under the provisions of the Water Industry Act 1991.
Thames Water requests that the Applicant should incorporate within their proposal, protection to the property by installi
other suitable device to avoid the risk of backflow at a later date, on the assumption that the sewerage network may su
conditions.
Thames Water would recommend that petrol / oil interceptors be fitted in all car parking/washing/repair facilities. Failure
oil interceptors could result in oil-polluted discharges entering local watercourses.
Water Comments
Thames Water recommend the following informative be attached to this planning permission. Thames Water will aim to
pressure of 10m head (approx 1 bar) and a flow rate of 9 litres/minute at the point where it leaves Thames Waters pipe
this minimum pressure in the design of the proposed development.
No impact piling shall take place until a piling method statement (detailing the depth and type of piling to be undertaken
piling will be carried out, including measures to prevent and minimise the potential for damage to subsurface water infra
works) has been submitted to and approved in writing by the local planning authority in consultation with Thames Wate
accordance with the terms of the approved piling method statement. Reason: The proposed works will be in close prox
infrastructure. Piling has the potential to impact on local underground water utility infrastructure. The applicant is advise
Services on 0845 850 2777 to discuss the details of the piling method statement.
Supplementary Comments
Foul Water: Thames Water require a detailed understanding of the existing discharge from the site including connection
and peak flow rates. We believe that this redevelopment has the potential to increase foul flow rates. We also need to u
discharge from the existing swimming pool.
Surface Water: Thames Water require a detailed understanding of the existing and proposed discharge from the site in
sewer system and peak flow rates.
Yours faithfully
Development Planning Department
Development Planning, Thames Water, Maple Lodge STW, Denham Way, Rickmansworth, WD3 9SQ
Tel:020 3577 9998 Email: devcon.team@thameswater.co.uk